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Goodwill and intangible assets (Tables) | 6 Months Ended
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Jun. 29, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill | The components of goodwill and other intangible assets are as follows: Goodwill:
| Global Ceramic segment |  | Flooring NA segment |  | Flooring ROW segment |  | Total
Balance as of December 31, 2018 |  |  |  |  |  |  |
Goodwill | $ | 1,564,987 |  |  | 874,198 |  |  | 1,409,206 |  |  | 3,848,391 |
Accumulated impairment losses | (531,930 | ) |  | (343,054 | ) |  | (452,441 | ) |  | (1,327,425 | )
| 1,033,057 |  |  | 531,144 |  |  | 956,765 |  |  | 2,520,966 |
Goodwill recognized during the period | (2,889 | ) |  | — |  |  | 47,543 |  |  | 44,654 |
Currency translation during the period | 5,879 |  |  | — |  |  | (5,797 | ) |  | 82 |
Balance as of June 29, 2019 |  |  |  |  |  |  |
Goodwill | 1,567,977 |  |  | 874,198 |  |  | 1,450,952 |  |  | 3,893,127 |
Accumulated impairment losses | (531,930 | ) |  | (343,054 | ) |  | (452,441 | ) |  | (1,327,425 | )
| $ | 1,036,047 |  |  | 531,144 |  |  | 998,511 |  |  | 2,565,702 |
Schedule of indefinite life assets not subject to amortization | Intangible assets not subject to amortization:
| Tradenames
Balance as of December 31, 2018 | $ | 707,380 |
Intangible assets acquired during the period | (874 | )
Currency translation during the period | 2,273 |
Balance as of June 29, 2019 | $ | 708,779 |
Schedule of intangible assets subject to amortization | Intangible assets subject to amortization:
Gross carrying amounts: | Customer relationships |  | Patents |  | Other |  | Total
Balance as of December 31, 2018 | $ | 651,012 |  |  | 254,483 |  |  | 6,535 |  |  | 912,030 |
Intangible assets recognized during the period | 2,092 |  |  | — |  |  | — |  |  | 2,092 |
Currency translation during the period | (2,464 | ) |  | (1,624 | ) |  | (9 | ) |  | (4,097 | )
Balance as of June 29, 2019 | $ | 650,640 |  |  | 252,859 |  |  | 6,526 |  |  | 910,025 |
Accumulated amortization: | Customer relationships |  | Patents |  | Other |  | Total
Balance as of December 31, 2018 | $ | 406,386 |  |  | 249,988 |  |  | 1,227 |  |  | 657,601 |
Amortization during the period | 12,597 |  |  | 1,072 |  |  | 15 |  |  | 13,684 |
Currency translation during the period | (1,523 | ) |  | (1,580 | ) |  | (2 | ) |  | (3,105 | )
Balance as of June 29, 2019 | $ | 417,460 |  |  | 249,480 |  |  | 1,240 |  |  | 668,180 |
Intangible assets subject to amortization, net | $ | 233,180 |  |  | 3,379 |  |  | 5,286 |  |  | 241,845 |
Schedule of intangible assets amortization expense |
| Three Months Ended |  | Six Months Ended
| June 29, 2019 |  | June 30, 2018 |  | June 29, 2019 |  | June 30, 2018
Amortization expense | $ | 6,955 |  |  | 7,483 |  |  | 13,684 |  |  | 15,050 |

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